public virtual void Write(PackFileSerializer s, BinaryWriterEx bw)
 {
     m_sphere.Write(s, bw);
     s.WriteVector4(bw, m_velocity);
 }
 public override void Write(PackFileSerializer s, BinaryWriterEx bw)
 {
     base.Write(s, bw);
     bw.WriteUInt64(0);
     m_sphere.Write(s, bw);
 }